February 2, 1917.

THE COLLIERY GUARDIAN.

257

Koppers’ Coke Oven

Is undoubtedly the most successful Bye-Product Oven on the market.

Since its introduction a little over 10 years ago there have been built

15,000 KOPPERS’ OYENS.

KOPPERS’ OVENS ARE AT WORK HEATED BY
PRODUCER GAS AND BLAST FURNACE GAS.

KOPPERS' DIRECT RECOVERY PROCESS

IS THE SIMPLEST AND MOST EFFICIENT
SYSTEM OF AMMONIA RECOVERY.

PLANTS ERECTED FOR THE RECOVERY OF
BENZOL & TOLUOL, FOR TAR DISTILLATION &
THE MANUFACTURE OF SULPHURIC ACID.

-------- Full particulars on application to -

The Koppers’ Coke Oven and Bye-Product Co

301, GLOSSOP ROAD, SHEFFIELD. -SSK’sSb™-

PRINCEPS PATENT

“DEFLECTOR” OIL SEPARATOR.

Capacity, 300,000 lbs. of
steam per hour,
60" diameter main.

ONE OF THE LARGEST
EXTRACTORS MADE IN THIS
COUNTRY.

PRINCEPS & CO.,

Engineers,
SHEFFIELD.

SPECIAL Self-contained MACHINE for CORRECT GRINDING of

STONE-DUST

For FIERY WORKINGS.

BRICKMAKING
MACHINERY

Suitable for COLLIERY SHALES.

Richard Scholefield, Issisi Leeds.

'Phone 1513.	ENQUIRIES SOLICITED. Wire “Brick, Leeds.”

MINERS’

SAFETY LAMPS.

Flame Lamps

FOR

THE OFFICIAL
AND THE
WORKING MINER,

With or without Electric Ignition.

Electric Lamps

WITH

Alkaline or Lead Batteries.

LAMP CABIN EQUIPMENTS.
UNDERGROUND RELIGHTERS.

LAMP STANDS.

LAMP BENCHES.

RIVET MOULDS.

LOCKING & UNLOCKING MACHINES.

LAMP CLEANING MACHINES.

SEND FOR LIST No. 41 L.

JOHN DAVIS & SON

(Derby) LTD.,

ALL SAINTS WORKS, DERBY ;

& 17, Victoria St., Westminster, London, S.W.

Telegrams—“ Davis, Derby.”	Telephone—240 Derby.